Final answer:
Patrick worked 1 hour to prepare 12 kilogrammes of dough, calculated by substituting 12 for d in the equation d = h + 11 and solving for h.
Step-by-step explanation:
The student asked how many hours Patrick worked if he prepared 12 kilogrammes of dough. The given equation is d = h + 11, with d representing the amount of dough prepared in kilogrammes, and h representing the number of hours worked. To find h, simply substitute d with 12 kilogrammes and solve for h:
- d = h + 11
- 12 = h + 11
- h = 12 - 11
- h = 1
Patrick worked 1 hour to prepare 12 kilogrammes of dough.